Inspector&#39;s gage.



F. B. COREY.

INSPECTORS GAGE.

APPLICATION FILED 050.2. 1914.

1 1 2,792. Patented Sept. 7, 1915.

Wz'zness es,

FRED B. COREY, OF EDGEWOOD, PENNSYLVANIA.

INSPECTORS GAGE.

Specification of Letters Patent.

Patented Sept. '7, 1915.

Application filed December 2, 1914. Serial No. 875,059.

To all whom it may concern:

Be it known that I, FRED B. COREY, a citizen of the United States,residing at Edgewood, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inInspectors Gages, of which the following is a specification.

My invention relates to inspectors gages and especially to those gagesknown as external and internal caliper or snap gages, and it isapplicable to such gages having a single pair of coacting gage surfacesor to those known as limit gages which have their gage surfaces arrangedto determine if the dimension gaged is between specified minimum andmaximum limits.

The object of my invention is to provide a gage that will permit greaterrapidity in its use without any sacrifice of sensitiveness of touch, andthus to increase the efficiency of the inspector using my invention.

My invention consists of the addition to a gage of the usualconstruction of an extension of one of the gage surfaces so as to form aguide, so that the material to be gaged will approach the gage in theproper position and at the proper angle for correct gaging.

In the drawings which illustrate my invention, Figure 1 shows a sideview of a plain external caliper gage. Fig. 2 is a side view of a plaininternal caliper gage. Fig. 3 shows a side view of an externaladjustable limit gage and Fig. 4 shows a section of the same gagethrough the line. XX of Fig. 3. Fig. 5 is a side view of an internaladjustable limit gage. Fig. 6 shows a side view of a stationary form ofgage similar to the gage illustrated in Fig. 3.

In the drawings of the different types of gages, A and B represent, ineach case, the two coacting gage surfaces, while A and B represent thesecondary coacting gage surfaces of the limit gages. No claim is made tooriginality in the form, arrangement or construction of these gagesurfaces, except that in each case the surface A is extended to form theguide surface C. It is the addition of this guide surface C, to gages ofvarious commercial forms, that is the basis of my invention.

In the use of my invention, the inspector will first bring the guidesurface 0 and the piece to be gaged into contact and into the properangular relation. This preliminary relation will be better understood byreference to Fig. 1, in which D indicates, in dotted outline, a sectionof a rectangular bar in its preliminary position With respect to theplain external caliper gage, and to Fig. 2, in which E indicates, indotted outline, a ring, the bore of which is in its preliminary positionwith respect to the plain internal caliper gage. After the gage and thematerial to be gaged are placed in proper relation by means of the guidesurface C, the gage is moved so as to bring the material into the properrelation to the gage surfaces A and B, by a sliding movement along theguide surface 0. Aside from this action of the guide surface 0, thegaging operation, with gages embodying my invention, does not differfrom the same operation when gages of the usual. construction areemployed.

I do not desire to limit myself to the exact construction andarrangement of parts here shown, but aim in the appended claims to coverall modifications which are within the scope of my invention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is 1. A gage having two edges carrying cooperating gage surfaces,one of said edges being continuous or unbroken and projecting beyond thelimits of the other to permit ofthe transverse application of the gageto the object to be measured and to serve as a longitudinal guide.

2. A gage having two edges carrying cooperating gage surfaces, one ofsaid edges carrying non-continuous gage surfaces, the other beingcontinuous or unbroken and projecting beyond the limits of the first topermit of the transverse application of the gage to the object to bemeasured and to serve as a longitudinal guide.

In witness whereof, I have hereunto set my hand this first day ofDecember, 1914;.

FRED B. COREY.

Witnesses:

Jos. A. BRooKs, ALnx PAFF.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. G.

